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New oxygen monitor tested in spinal anesthesia study

NCT ID NCT06566690

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This completed study looked at whether a new monitoring tool called Oxygen Reserve Index (ORi) can give earlier warning of low oxygen levels in patients having varicose vein surgery under spinal anesthesia. The study included 56 adults and compared standard oxygen monitoring with ORi monitoring. The goal was to see if ORi could help doctors adjust oxygen therapy more precisely and prevent both too little and too much oxygen.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

56 people

The number who actually took part.

Started

Aug 2024

Finished

Mar 2026

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

This study aims to include ASA I-II patients aged 18-65 years scheduled for elective varicose vein surgery, with the sample size to be determined by a pilot study

Ages

18 to 65 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: \- ASA I-II Exclusion Criteria: * Chronic Obstructive Pulmonary Disease (COPD) * Smoking history of \>30 pack-years * Cancer patients * Interstitial lung disease patients * Patients with Body Mass Index (BMI) \>30 kg/m² * Patient refusal of spinal anesthesia * Refusal to participate in the study

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Conditions

The condition(s) this trial relates to.

Hyperoxia Hypoxia

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Contacts and locations

Locations

  • Kocaeli University

    Kocaeli, Turkey (Türkiye)

More trials for these conditions

Other studies related to the condition(s) this trial covers.